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Saturday, 31 October

JEE Main 2021 · PhysicsMultiple choiceMatch the listEasyRecall

JEE Main 17 March 2021, Shift 2, Physics Q7

Question 7 of 90 in this shift, Physics question 7 of 30, Section A.

Match List - I with List - II List - I List - II (a) Phase difference between current and voltage in a purely resistive AC circuit (i) π2\frac{\pi}{2} ; current leads voltage (b) Phase difference between current and voltage in a pure inductive AC circuit (ii) zero (c) Phase difference between current and voltage in a pure capacitive AC circuit (iii) π2\frac{\pi}{2} ; current lags voltage (d) Phase difference between current and voltage in an LCR series circuit (iv) tan⁡−1(XC−XLR)\tan^{-1}\left(\frac{\mathrm{X_C-X_L}}{\mathrm{R}}\right) Choose the most appropriate answer from the options given below :
  1. (1)(a)-(i), (b)-(iii), (c)-(iv), (d)-(ii)
  2. (2)(a)-(ii), (b)-(iv), (c)-(iii), (d)-(i)
  3. (3)(a)-(ii), (b)-(iii), (c)-(i), (d)-(iv)Official answer
  4. (4)(a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)

Official answer

Option 3

NTA final key.

Chapter
Alternating Current
Topic
Phasor Diagrams
Idea tested
Phase Relations in RLC

Same idea in other shifts

Asked 8× in all
  1. 4 Apr 2024, Shift 1 · Q43In an ac circuit, the instantaneous current is zero, when the instantaneous voltage is maximum. In this case, the source may be connected…MediumOther
  2. 4 Apr 2024, Shift 2 · Q44Match List I with List II LIST I | LIST II A. Purely capacitive circuit | I. [figure: phasor diagram, II along the vertical axis (up) and…MediumMatch the listHas a figure
  3. 6 Apr 2023, Shift 2 · Q47A capacitor of capacitance 150.0 μ\muF is connected to an alternating source of emf given by E=36sin⁡(120πt)E=36\sin(120\pi t) V. The maximum value of…EasySingle correct
  4. 13 Apr 2023, Shift 2 · Q44Given below are two statements: Statement I : An AC circuit undergoes electrical resonance if it contains either a capacitor or an…MediumTwo statements
  5. 28 Jul 2022, Shift 1 · Q44The equation of current in a purely inductive circuit is 5sin⁡(49πt−30∘)5\sin(49\pi t-30^\circ). If the inductance is 30 mH then the equation for the…MediumSingle correct
  6. 22 Jul 2021, Shift 2 · Q4In a circuit consisting of a capacitance and a generator with alternating emf Eg=Eg0sin⁡ωtE_g = E_{g_0}\sin\omega t, VCV_C and ICI_C are the voltage…EasyDiagram basedHas a figure
  7. 9 Jan 2020, Shift 2 · Q15In LC circuit the inductance L=40L = 40 mH and capacitance C=100 μC = 100\ \muF. If a voltage V(t)=10sin⁡(314 t)V(t) = 10\sin(314\,t) is applied to the circuit,…MediumSingle correct

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.